Is SIX5 p.Pro623Thr (c.1867C>A) pathogenic?

SIX5 p.Pro623Thr (c.1867C>A) is classified Uncertain significance in SIX5 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-04-15). AlphaMissense: likely benign (0.0659); Absent from gnomAD v4.1.

How common is SIX5 p.Pro623Thr (c.1867C>A) in the general population?

SIX5 p.Pro623Thr (c.1867C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SIX5 p.Pro623Thr (c.1867C>A)?

AlphaMissense predicts likely benign (score 0.0659) — an in-silico prediction, not a clinical call.

SIX5 p.Pro623Thr

c.1867C>A · rs201346622 · VCV2971081

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0659 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,598,784)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0659	likely benign
REVEL	0.115	moderately benign-leaning
SaProt	LLR -7.26	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.8	GERP -2.5, phastCons 1
Regional constraint	o/e 1.27	unconstrained · MANE · 2,547 bp · p 3e-11 · regional, not allelic
Overall
CADD	8.595	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,598,784). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: SIX5
Protein: p.Pro623Thr
Coding: c.1867C>A
MANE Select: NM_175875
dbSNP: rs201346622
Type: single nucleotide variant
Location: chr19:45765854 (GRCh38)
Gene constraint: LOEUF 1.08 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 53.21
Residue 623: the 'disordered' region

Full SIX5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SIX5 p.Pro623Ser Uncertain significance ★ ⚠ same residue
SIX5 p.Ala408Thr Uncertain significance ★★ ⚠ same type
SIX5 p.Ala411Val Uncertain significance ★★ ⚠ same type
SIX5 p.Ala584Val Uncertain significance ★★ ⚠ same type
SIX5 p.Ala626Thr Uncertain significance ★★ ⚠ same type
SIX5 p.Ala649Ser Uncertain significance ★★ ⚠ same type
SIX5 p.Ala673Thr Uncertain significance ★★ ⚠ same type
SIX5 p.Ala722Gly Uncertain significance ★★ ⚠ same type

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/six5-p-pro623thr (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown